碩士 / 國立清華大學 / 生物資訊與結構生物研究所 / 95 / Abstract：
There are many aquatic plants that absorb heavy metals, and provide oxygen. Ceratophyllum demersum L. is a very common submerged aquatic plant that grows in the ponds, ditches and lakes. It can efficiently absorb surplus heavy metals released by factories and is used for the assessment of toxic metal contamination in special area.
In order to understand the influence of copper ions on Ceratophyllum demersum L the chlorophyll fluorescence of the plant was used an indication of physiological status, parafilm slicing followed by microscopic observation was used to monitor the damage of the plants at tissue level and mass spectroscopy was used to find out the distribution of copper ions it plant’s body. We found that the photosynthetic efficiency of Ceratophyllum demersum L declined with increasing copper concentration to 100μM and leaf detachment after 10 hours . About 662μg/g copper were accumulated in the leaf and 99μg/g in the stem of Ceratophyllum demersum L ,after exposure to 100μM copper for 24 hours . Electric conductivity was decreasing. Morphological symptom of stem was observed spaces between cell wall and diminished cell at leaf detachment area. Ca could delay the leaf separate for 2hours.
| Identifer | oai:union.ndltd.org:TW/095NTHU5112021 |
| Date | January 2007 |
| Creators | 羅宜華 |
| Contributors | 徐邦達 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 52 |
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